| 摘要 |
An apparatus and a method for searching an input picture in a television receiver. The apparatus comprises first and second intermediate frequency processing circuits for processing broadcasting signals detected by first and second tuners at audio and video intermediate frequencies, a video signal processing circuit for processing a video signal from the first intermediate frequency processing circuit so that it can be displayed as a main picture, a key matrix unit having a key for selecting a POP mode and a key for selecting a stop mode, a microprocessor for outputting a plurality of control signals to perform the POP and stop modes selected by the key matrix unit, a switching circuit for selecting one of a video signal from the second intermediate frequency processing circuit and external input video signals under the control of the microprocessor, a synchronous signal detector for detecting a synchronous signal from an output video signal from the switching circuit, a PIP processing circuit for processing the output video signal from the switching circuit so that it can be displayed as a sub-picture, a picture ratio converter for converting a video signal ratio into a main picture to sub-picture ratio, and a color signal processing circuit for displaying an output video signal from the picture ratio converter on a Braun tube. |
